Roon Dropouts - Why?

@support @Jamie - Thanks.

SET UP
ROON - 1.8 (Build 898).

CORE - Win 10 PC, i7-7700 @4.20Ghz, 32 GB Ram
OS Windows 10 Pro, version 21H1.
CLIENT - As Above.

AUDIO - Sonos - Pair of Fives. (only single zone).
- Sonos Streaming Enabled, Airplay Disabled for Fives.

AUDIO SOURCE - Tidal.

NETWORK
PC Wired
Sonos Beam. (Wired).
All Sonos components show as Wired, due to Mesh
network.

MORE DETAILS
I’ve been using Roon for over 12 months, and this has been happening regularly. I had previously put this down to poor Wi-Fi & ISP provider drop outs.
However, I’ve changed to Fiber ISP, increased download speed by 50%, and I’ve connected Sonos & PC via a Ethernet cable, and internet connection is stable, and regularly speed test, but I’m still having the same problem.

ERROR
‘Roon has lost control of Audio Device’
This doesn’t re-connect, by pressing play again, and unable to play again.
However, I can play the same Album from Tidal, using the Sonos app on the Same PC, without dropouts or failures.

SCREENSHOTS
RoonPath
Sonos-Wired

This is similar to this error, as I get the same behavior before the error message.

Please advise.